Jensen's alpha

I recently got e-mail mentioning Jensen's alpha. It didn't ring a bell, so I search gummy-stuff.org (My memory is so lousy that I often have to do that.) Anyway, it ain't there so I google and wrote what I found, here. It's interesting, but (like most things I've written about) I don't think it's very useful. Nevertheless, it generates a number that (along with a jillion other numbers) one can add to one's arsenal in order to gauge the performance of stocks and/or funds. As Ron McEwan says in an e-mail, it gives "a better look ahead down a foggy road". Click for the big picture. Okay, wanna see magnificent J-alphas? My coal stock#1 got J-alpha = 11%. My coal stock#2 got J-alpha = 13%. My lithium stock got J-alpha = 33%. Whooeeee!!